Module parquet::file::metadata

Contains information about available Parquet metadata.

The hierarchy of metadata is as follows:

ParquetMetaData contains FileMetaData and zero or more RowGroupMetaData for each row group.

FileMetaData includes file version, application specific metadata.

Each RowGroupMetaData contains information about row group and one or more ColumnChunkMetaData for each column chunk.

ColumnChunkMetaData has information about column chunk (primitive leaf column), including encoding/compression, number of values, etc.

Structs

• ColumnChunkMetaData
  Metadata for a column chunk.
• ColumnChunkMetaDataBuilder
  Builder for column chunk metadata.
• ColumnIndexBuilder
  Builder for column index
• FileMetaData
  Metadata for a Parquet file.
• OffsetIndexBuilder
  Builder for offset index
• ParquetMetaData
  Global Parquet metadata.
• RowGroupMetaData
  Metadata for a row group.
• RowGroupMetaDataBuilder
  Builder for row group metadata.

Type Aliases

• FileMetaDataPtr
  Reference counted pointer for FileMetaData.
• KeyValue
• ParquetColumnIndex
  Index for each row group of each column.
• ParquetOffsetIndex
  PageLocation for each datapage of each row group of each column.
• RowGroupMetaDataPtr
  Reference counted pointer for RowGroupMetaData.